Mac OSX Makefile for asio chat example http://think-async.com/Asio/asio-1.10.6/doc/asio/examples/cpp11_examples.html

Makefile

COMPILER=clang++
CPP_FLAGS=-D ASIO_STANDALONE -std=c++11 -stdlib=libc++
INCLUDES=-I/path/to/asio-1.10.6/include

all: client server

client: chat_client.cpp
        $(COMPILER) $(CPP_FLAGS) $(INCLUDES) -o $@ $< 

server: chat_server.cpp
        $(COMPILER) $(CPP_FLAGS) $(INCLUDES) -o $@ $< 

clean:
        rm -f server client